{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["Chemical"], "input": "A multi - residue method for the determination of 124 pesticides in rice by modified QuEChERS extraction and gas chromatography - tandem mass spectrometry ."}
{"Chemical": []}